Improvement in presses



W. I. TATE.

PRESS.

N0. 108,208. Patented Oct. l1, 1870.

w(italiani tapes Vternir-unt (time WILLIAM I. TATE, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T() HIM- SELF AND HENRY R. MITCHELL, OF SAME PLAGE.

Letters Patent No. 108,208, dated october 11, '1870.

IMPROVEMENT IN PRESSES.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that I, WILLIAM I. TME, of Philadelphia city and county, in the State of Pennsylvania, have invented certain new and useful Improvements in Presses; and I hereby declare the following to be a full and exact description thereof, reference being had. to the accompanying drawing forming part of this specification.

lhe nature or essence of my'invention consists in constructing a press in which the compressing force is applied by means of pulleys of different diameters, known as differential pulleys, and also in aparticular combination and arrangement of pulleys, chains, and gears, for the convenient and eifective operation of the press, as will be fully set forth below.

In the drawing hereinbefore mentioned- Figure 1 is an elevation of an end of one of my improved presses;

Figure 2, a plan or top view, with the top frame left off at one end; and

Figure 3 is an edge and sectional view of the differential pulley.

A is the bed of the press, and

B, the follower.

rlhese may be made of cast-iron, in 'box form, as shown, and strengthened by flanges or divisions D', or otherwise, as may be preferred.

To draw the follower down toward the bed, and produce such an amount of pressure upon the substance placed between them as may be required, I place in the bed A the' shafts C, and iu the follower B the shaft-s D, these shafts all having proper journals, to turn -in boxes provided for them, in the hed and follower respectively.

Upon thc ends of the shafts D l fasten the pulleys E, and upon the shafts (l, thc larger pulleys F, and also the smaller pulleys G, thus forming differential pulleys. (See fig. 8.)

The pulleys I-I are suspended on the chains I, which pass over the fixed pulleys J', and are fastened to the follower B.

Each of the endless chains 1i passes over the pnl# ley E, then down under the larger pulley F, then up over the suspended pulley H, then down under the smaller pulley G, and up to the pulleyE again, where we beganv to trace its course.

The pulleys F and G are provided with projections er teeth, shown in iig. 3, which take into the links of the chains K, and prevent their sliding on these pullhe gears L, fastened on the shafts C, are turned by the pinion N, which may be opclitted by a crank and hand-power, or by any other motive force adapted to such a purpose.

Operation.

Motion being given to the shafts C andthe pulleys fastened thereon, the chain K is delivered by the small pulley G, passes up over the pulley'E, and is taken up by the larger pulley F; but as the pulleys G and F are fastened on the same shaft and turn tcgether, it is eviden-t that the chain will be taken up by the pulley of larger circumference somewhat faster than it is delivered by the smaller' one, and that, consequently, the loop or bite, passing over the pulley E, will be continually shortened by this operation. The follower B will, therefore, be drawn down toward the bed A, and the compressing force thus produced, by the application of a given motive power, will be inversely proportionate to the difference between the diameters 'of the pulleys F and G; moreover, the force obtained directly from the action of `the differential pulleys is doubled (theoretically) by the use of the movable pulleys E.

To turn the follower up again, it is only-necessary to reverse the motion; and it will be seen that if, in that case, the crank be transferred to one of the shafts G, a much more rapid rnotion may be given to the follower, the crank being then turned in the same direction as before instead of backward.

rlhe opposite end of the press to that presented in the drawing is precisely similar to the front end, excepting the gears and pinion; the shafts O extending through the bed, so as to carry the pulleys -on that end, those parts are not required there.

When the loops of the chains K, passing over the pulleys E, are shortened or lengthened, the opposite change will, of course, take place in the slack loops passing over the pulleys H,and the rise and fall of the follower will accordingly let this latter loop down or take up the slack, as in each case required, by means ofthe chains I, passing over the pulleys J.

In many cases the posts S and cross-bars V may be dispensed with, and the pulleys J suspended from the floor-joists or other fixtures at the top ofthe room where the press is used.

These presses can be very cheaply constructed, and are very durable, portable, and easy to operate; and I contemplate providing them with boxes and all other needful appendages to adapt them to the compression of cotton, hay, and every other kind of product or material to which they are capable of being applied.

It is evident that no specific number o f sets of pnlleys is required for theconstruction of a press, but that'either four or more, or fewer, may bc employed, as preferred.

For pins on the pulley-wheels, to hold the chain,

projections 0r ribs on the \vl1eel, to t between the links, may be substituted.

The foregoing being a description of my improvements in presses,

VVLiat I claim, and desire to secure by Letters Palt- `ent, is- Y 1. The combination, with a. bed, A, shafts C and.

D, and follower B, of the pulleys E, F, sind G, and the chain K, all constructed and' arranged substantially as and for the purpose specified.

l 2.y In combination wit-l1 the pulleys F51, and G,

and the chain K, the pulleys H and J, and the chain or cord I, arranged 'to operate substantially as described.

3. In combination with the pulleys E, F, and G, and the chain K, thev gears .L and pinion N, for operatingfb same. substantially as described.

' M. I. TAT-E3.

Witnesses:

MICHAEL QUIR'K, J os, A. OALVERT. 

